title: CoRoT measures solar-like oscillations and granulation in stars hotter than the Sun.
abstract: Oscillations of the Sun have been used to understand its interior structure. The extension of similar studies to more distant stars has raised many difficulties despite the strong efforts of the international community over the past decades. The CoRoT (Convection Rotation and Planetary Transits) satellite, launched in December 2006, has now measured oscillations and the stellar granulation signature in three main sequence stars that are noticeably hotter than the sun. The oscillation amplitudes are about 1.5 times as large as those in the Sun; the stellar granulation is up to three times as high. The stellar amplitudes are about 25% below the theoretic values, providing a measurement of the nonadiabaticity of the process ruling the oscillations in the outer layers of the stars.
authors.affiliation: Laboratoire d'Etudes Spatiales et d'Instrumentation Astrophysique (LESIA), Observatoire de Paris, CNRS (UMR 8109)-Université Paris 6 Pierre et Marie Curie-Université Paris 7 Denis Diderot, Place Jules Janssen, F-92195 Meudon, France. Eric.Michel@obspm.fr
authors.forename: Eric
authors.initials: E
authors.lastname: Michel
authors.forename: Annie
authors.initials: A
authors.lastname: Baglin
authors.forename: Michel
authors.initials: M
authors.lastname: Auvergne
authors.forename: Claude
authors.initials: C
authors.lastname: Catala
authors.forename: Reza
authors.initials: R
authors.lastname: Samadi
authors.forename: Frédéric
authors.initials: F
authors.lastname: Baudin
authors.forename: Thierry
authors.initials: T
authors.lastname: Appourchaux
authors.forename: Caroline
authors.initials: C
authors.lastname: Barban
authors.forename: Werner W
authors.initials: WW
authors.lastname: Weiss
authors.forename: Gabrielle
authors.initials: G
authors.lastname: Berthomieu
authors.forename: Patrick
authors.initials: P
authors.lastname: Boumier
authors.forename: Marc-Antoine
authors.initials: MA
authors.lastname: Dupret
authors.forename: Rafael A
authors.initials: RA
authors.lastname: Garcia
authors.forename: Malcolm
authors.initials: M
authors.lastname: Fridlund
authors.forename: Rafael
authors.initials: R
authors.lastname: Garrido
authors.forename: Marie-Jo
authors.initials: MJ
authors.lastname: Goupil
authors.forename: Hans
authors.initials: H
authors.lastname: Kjeldsen
authors.forename: Yveline
authors.initials: Y
authors.lastname: Lebreton
authors.forename: Benoît
authors.initials: B
authors.lastname: Mosser
authors.forename: Arlette
authors.initials: A
authors.lastname: Grotsch-Noels
authors.forename: Eduardo
authors.initials: E
authors.lastname: Janot-Pacheco
authors.forename: Janine
authors.initials: J
authors.lastname: Provost
authors.forename: Ian W
authors.initials: IW
authors.lastname: Roxburgh
authors.forename: Anne
authors.initials: A
authors.lastname: Thoul
authors.forename: Thierry
authors.initials: T
authors.lastname: Toutain
authors.forename: Didier
authors.initials: D
authors.lastname: Tiphène
authors.forename: Sylvaine
authors.initials: S
authors.lastname: Turck-Chieze
authors.forename: Sylvie D
authors.initials: SD
authors.lastname: Vauclair
authors.forename: Gérard P
authors.initials: GP
authors.lastname: Vauclair
authors.forename: Conny
authors.initials: C
authors.lastname: Aerts
authors.forename: Georges
authors.initials: G
authors.lastname: Alecian
authors.forename: Jérôme
authors.initials: J
authors.lastname: Ballot
authors.forename: Stéphane
authors.initials: S
authors.lastname: Charpinet
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Hubert
authors.forename: François
authors.initials: F
authors.lastname: Lignières
authors.forename: Philippe
authors.initials: P
authors.lastname: Mathias
authors.forename: Mario J P F G
authors.initials: MJ
authors.lastname: Monteiro
authors.forename: Coralie
authors.initials: C
authors.lastname: Neiner
authors.forename: Ennio
authors.initials: E
authors.lastname: Poretti
authors.forename: José Renan
authors.initials: JR
authors.lastname: de Medeiros
authors.forename: Ignasi
authors.initials: I
authors.lastname: Ribas
authors.forename: Michel L
authors.initials: ML
authors.lastname: Rieutord
authors.forename: Teodoro Roca
authors.initials: TR
authors.lastname: Cortés
authors.forename: Konstanze
authors.initials: K
authors.lastname: Zwintz